Casting-mold



P. HACHMAN.

CASTING MOLD. APPLICATmN HLEn Jung 19, 191i. HErlxEv/En MAY 13. |920. ilj.,

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F. Hmm/IAM;A CASTING MOLD. APPLICATION FILED JUNE19| 1917. RENEWD MAY 13.1920. 1,356,714.

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lmold cavity` ,FREDERICK HACI-IMANN'v- MENTS, TO NATIONAL vA CORPORATION OF MISSOURI.

, .ENT` oFFiCE..

OF ST. LOUIS, MISSOURI, ASSIGNOR, MESNE ASSIGN-- 'METAL DIE MOLD COMPANY, OF ST. LOUIS, MISSOURI,

CASTINGMOLD.

Application filed June 19, 1917,

`mold is prilividled with .venting passages adapted to insure withdrawal of the gasesfrom the in old cavitv, and provided with lubricant` conducting passages adapted supply to and maintain on the walls of the. a lubricant, so as lto prevent adhesion of the metal to' the mold. molds.described in the above applications.

the casting to he made isl a simple casting.

iequiring no core.v

lYhei-e a coredrasting is required, the eoiistruction involves ditieulti'es of construction and operation. i' more especially designed vtor casting' such alloys of copper, as brassanjd bronze., dilliculty is experienced not only in gassing, but also adhesion or. solderingoi the metal to Moreover. coellieients ol5 expansion` so that contraction of the nietal`diiring the vcooling on an unyielding core. ing to break, castings.l

One ol the objects ol` this invention, therefoie,'is to provide a casting mold employing a core. in which the witlnlrawal ol the air and other gases from at the lace ol the core, is insured, and 1n which the lface o"v the core is treated in suoli a manner/ as torprevent adhesion of the metal to the eore.

Another object -is lo provide a castingl mold employing a core which has provisions for contracting the same, age ol the metal can be counteracted, and the,A core readily removed Jrom the eastinf.

In the accomi anying drawing,

thus producing Figure l is a plan of a inoldy embodying"` this invention 5 Specification of Letters Patent.

Serial No. 175,663. Renewed Mayl. 1920.

to .p

in'ce this typeoll mold is` 'si-ich alloys have high' willy frequently canse the castf del'eeti ve the mold cavity ,and

so that the shrinkabsorb and retain thelnbricant.

:material whieh `answer this purpose is a granular; porous innemen (ii-L26. 192e.

seriaiivo'. 381,193".

Figd is a section ,on the line 2-'-2, Fig'. l.

Fig. 3 is a plan of the core; v

Figui is a sectioinon the line V-.t--Jf, Fig. il; Figx is a detail bottom view otthe core;

Fig'.4 T is a perspective view of the same; and, f

Figs. and 9 are detail perspective views ot the core, element-s.

vliraccordance with this invention the` mold is' providedwith venting passages which vent the nio'ld cavity at numerous points along the core tace.

lubricant,supply in the core to the Jaces of the core. loth the venting and lubricating` passages -aref'cai'iillary passages,'so .as to avoid flowing' o'l1 the cast metal therein, andl the venting passages are arranged adjacent v the lubricant conducting passages,'so asl to carry ollA any gases which may be formed. The. core comprises sections separated b v a Contracting member which is itself ooi;-

tractibleaand means are provided \\"liert iby may be conlractedaand the-iiieiiihei.".itselt may bev contract'eth so as to contract fthe core along a plurality ol transverse axes.

.Referring to the accompanyingdrawings. l hand* 2 `designate upon movement` ol this inemberjfthe sections construction, so that. the mold n'iay be lieat' ed and maintainedhat a iinilorin temperature.v 'i

Formed vin each mold section and spaced i so as to follow the-- vcontour thereot, is a series ot' pockets 7,

around the mold cavity,

adapted to reteive the lubricant, such asa high lasli point mineral lubricating oil,

Lubricant con-v "dncting passagesalso lead Yl'roin a soerce, of

mold sections' which 'are -ormed yto provide' a mold cavity ol the 'shape of the casting .tov

are provided ens vuio

and a lubricant carrying vehicle adapteilto found to satislaeto'rily i l li si A veliiele` outside surface l,of

' clearly lof the core section.'

. plate has upwardly directed carbon, about the size ofy a matchA head. The pockets T are open at their lower ends and are closed by plugs 9, so as to permit the bottoms tol be o cned, in order to facilitate removal of tie lubricant and its vehicle. Formed in each mold section is a series of slots 11., adapted to receive plates 12. Each of these plates have formed on the outside surface thereof, a vertical channel 13, and a series of downwardly 'directed capillary grooves 11. leading from the mold cavity to Athe channels 13. The channels 13 in the different plates, discharge into a semi-circular channel 15, so as to be in free communi- .catioiif-jsiith the outside air. The inside or engalf'ng faces of the plates12, have formed therein. upwardly extending grooves 1T. the grooves in a pair of plates. forming capil- .lary lubricant' conducting channels extending dmvnwardlv from the pockets 7, to the Formed in feach mold section ,18,.leading from the jnnc tion ofthe plates "12, to the-pockets '7, so asl to form 4continuations of the channel li'. There is thus formed a series of downwardly directed lubricant conducting.channels between the pockets and the mold cavit v as shown in Fig. Inorder to retain the plates l12 -in place inthe mold, the up- ;per and llower faces of `armold section, and vthe ends of theplatcs. aregroovedto receive rings 19,`which are .s(\.i,.1'xitcrtlieI grooves.

The parts so -far described may be substantially as shown inA the application re` ferred to; to which reference is'had for details of construction.

Referring now moreparticularly to Figs.

3 to 9 inclusive..mounted within the mold cavity is a core comprising movable secyan expanding section 26.

tions 25, and y together. v the which are adapted to form I complete core; The lower ends of these core sections `are enlarged. as shown at 2, and this end is arranged to it within an enlarged end ofthe mold sections. as shown in Fig. 2, `and rest on one of the crosspieces 4. Formed in each corev ysection 25, is ay channel 28. adapted to receive a pair of plates 29,shown in detail in Fig. S, Each of these plates is provided on its faces with downwardly extending `grooves 30, communicating `with laterahgrooves 31. on the backface. Formed in each corcsection is a groove 32, extending "from end to end The grooves 3() 'constitute a series 'of downwardly directed capillary venting.,passages.r connecting the the core with the outside air. through the grooves `S11-and 32. Set `into slots 33, in each mold section, is a plate. 31, shown vin detail -inl*`ig. .0. and this .grooves 3f. cut in vitsside faces, and lateral grooves 3G. cut

in its back face, and connecting with the:

free from graphite, and in pieces ythls member shaped recess 19 ,either of the dowels 11 or 412.

ment with the core ,eral oil. andthis grooves Slits or grooves 37, connect the slots 33 with pockets 38, which are lled with a lubricant and a lubricant carrying vehicle, as is the case of the pocket 7. There is thus formed a series of lubricant ducting passages, leading downwardly from the pockets tothe outside face of the core.

wardly from the outside to grooves 10, cut in the engaging faces, and open at both ends. The grooves 39. therefore, form additional venting passages leading from the surface of the core.

he core sections '25 dowels 11. 12 and 13. which pass through slots in the expanding section 26. This expanding section is of wedge form, as shown in Fig. 7, and has ribs 11. cooperating with corresponding recesses in the core sections 25. with a projecting head 15. to permit manipulation thereof. The wedge section. by movement with respect to the core sections, spreads these core sections apart. and thus are connected by i his wedge section is also providedpermits expansion or contraction ofthe core. I

n orderto permit expansion and contrac-4 ytion vof the e.\pandn'1g member or `wedge, isl slotted. as shownat 16 and lEach slot starts from a ,transverse per- Yterminates in or 50; coperating with 17. foration 18, and

Vhen the wedge 26 is moved into alinelsectionras shown in Fig. 1. Vthe wedging action of tl and ad. on the dowels 11 and 12. will actto spreadthe sides of the ywedge outwardly, and aline these sides with the core section. so as to form continuations thereof. 'hen. however, the wedgeis moved downwardly from the position shown in Fig.' 1. the slots 16and .17, will merely close on account of the resiliency of the metal, Aso as to con` tract the wedge laterally. It course. be understood thatlthe core is.wlien assembled and machined.toltrne diameter. in a position where the wedgezis in normal position. asshown in ,-Fig; 1. jsoyth`at.t`he metal ofthe wedge is,''.at this time. under tension.

The operation casting will lbe obvious froln the` referred to. vrlhe pockets containingl the lubricant retaining vehicle. are filled .with a lubricant. such asa high :flash point. minlnbricant is also preliminarxly .applied-to the .inside faces of the mold in any snit-able,manner. The mold being placed'v in the position. as shown in Figs. 1 and 2. .with the core expanded, the metal is poured in. and during `his poule" ing operation. the llubricant being maintained on the core and mold surface. will prevent sticking-of the metal to the core and iltility of the mold in a wedgei 1e recesses .19

application and mold. while the venting passages will Cil carry ofil the air and other gases which may be .formed or be present. Upon the completion of the pouring operation, the, mold is moved tothe left, Fig. l. so as to remove the .wedge ZG Jfrom over the cross-piece et; the top 45 of almnnmer.v so as to move it downwardly, thereby. causing' instant contraction of the core, a1'1d`rclievngthe tension of the metal during its cbntraction.` The mold sections arc then separated and the casting is removed..

lt is obvious that'lvariouschanges may be made in the details without departing from the spirit ot this invention. 4It is.`therefore, to be understood that this invention is not to be limited to the specific yconstruction shown and described.

Having Athus described the invention, what is claimed is: v

l. ln a casting mold having a cavity adapted to Jr'orm a casting, a core having venting' passages adapted and arranged to vent the mold cavity at numerous points between'the core face andthe casting so as to permit escape of the gases from below the level ot the material being cast during the casting operation. and a seriesof lubricating passages in the core Jfor supplying lubricant to the tace ot the cpre.

2. ln a cas-ting mold having a mold cavity adapted to form a castingg-a core 'having a, venting channel and venting passages leading trom the core face to said channel adapted and arr: nged to vent the mold cavity at numerous points between the core tace and the casting soI as to permit escape ot' the gases from below the level ot the material being cast during the lcasting operation, and a series ot lubricating passages' in the core for i'ace ot the core.

3. ln a casting mold having a. mold cavity adapted to t'orm a casting, a core havmg means tace ot' the core.

su l.plying lubricant to the 4, In a casting mold having a mold cavity adapted to form a casting, a core having means to* applying a lubricant to the l-tace ot the .core'characterized by the feaadapted to apply' ture that said means is the lubricant at numerous points Aon the face ot the core. i. t

In a casting mold having a mold cavity adapted to form a casting, a. core having means for applying a lubricant to the tace o't' the core characterized by the Jf'ea-' ture that said means is adapted to 'maintain the lubricant on the face of the core.

G. ln a mold having a mold cavity odapted to torm a casting.y a core having means tor applying a lubricant to the tace of the core characterized by the provision the wedge is then tapped with p ity adapted`to for applying' a lubricant to the cant from saidsupply to the tace of the core characterized by the feature that said lubricant supply contains a 4vehicle adapted to carry'the lubricant.

8. In a casting mold having a mold cavity adapted to form a casting, a core having means for applying a lubricant to the face of the core and having means `for withdrawing the gases vat the face of the core from themold cavity. L

9`. "In, a asting mold having a mold cavity l'adapted Ito i'orm ing` means for applying a `lubricant to the face ot' the core, and having' means tor withdrawing the gases at the tace ot the core from the mold cavity characterized by the. 'ea'ture'that'said means comprise passages opening' at numerous points on the face of the core.

l0. In a casting mold having a` mold cav'- ity adapted to torni a casting, a core comprising a plurality ot' separate :ulj'acently` supported sections. said core being adapted and channels for cona casting, a core liav` v for contraction along' a"pluril1lityotl trans-'- `core x-.ill ltor applying a lubricant to the tace ot the core.

1l. ln a casting mold having a mold cavto'g'm a' eastingga c'ore comprisinga pluiilitlfot separate adjacently supported sect-ions. 4sridcore being adapted for centi-action Aalong a'plurality of transverse-Faxes by movement of said sections toward each other, means for causing contraction ot' said sections, and passages for conducting a lubricant to the tace ot' the core. Y l2. ln a casting mold having a mold cavity adapted to t'orm a casting, a core comprising' a plurality .of separate adjacently supported sections adapted t'or movement` toward each other to contract the core along a plurality oi transverseaxes. a contractible member removably supported between said sections, and means for applying alubricant to the tace of the core formed by Said sections.

i3. ln a casting mold having a mold cav- I ity adapted to form a casting, a core conr-n provision of means operating upon movement ofv said member adapted to expand und contract the Core In 21, castingimold having ay mold cavit;7 adapt-ed to forme casting', a core comprising :L plurality of separate' adjaoently.

supported sections adated for movement toward each other t0 contract the core alongv vof transverse axes, and av conf :1 plurality traetible member removably supported between said Sections characterized by Ithe provision of mea-ns operating upon movemento said member to contract said sections and said member.

In testimony vWhereofl FREDERICK HAAGHMANN. 

